\documentclass[12pt]{article}
\usepackage[utf8]{inputenc}
\usepackage{amsmath}
\usepackage[ngerman]{babel}
\title{\LaTeX}
\begin{document}

% Remember: Use Oxford English!
\section{Vorwort}
\input{vorwort}
\section{Filme}
\input{vorwort-komoedie}
\input{vorwort-science-fiction}
\input{vorwort-kunstfilm}
\end{document}
